package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

/**
 * @Description TODO
 * @Author dingchunlin
 * @Date 2023/8/18 16:57
 * @Version 1.0.0
 */
@Service
@Slf4j
public class UserServiceImpl implements UserService {

    //微信服务接口地址
    public static final String WX_LOGIN_URL = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChatProperties;


    @Autowired
    private UserMapper userMapper;
    /**
     * 微信登录
     * @param userLoginDTO
     * @return
     */
    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {
        //调用微信登录方法
        String openId = getOpenId(userLoginDTO.getCode());
        //判断oppenid是否为空，如果为空表示失败，抛出异常
        if (openId==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断用户是都为新用户
        User user = userMapper.getByOppenId(openId);

        //如果是新用户则自动注册
        if (user == null) {
            user = User.builder()
                    .openid(openId)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
        //返回这个对象
        return user;
    }


    /**
     * 调用微信接口服务获取openid
     * @param code
     * @return
     */
    private String getOpenId(String code){
        //调用微信接口，获得当前用户的oppenid
        Map<String, String> map = new HashMap<String, String>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN_URL, map);
        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
